import router from './router'
import store from './store'
import {
  Message
} from 'element-ui'
import NProgress from 'nprogress' // progress bar
import 'nprogress/nprogress.css' // progress bar style
import {
  getToken
} from '@/utils/auth' // get token from cookie

NProgress.configure({
  showSpinner: false
}) // NProgress Configuration

const whiteList = ['/login'] // no redirect whitelist

router.beforeEach(async(to, from, next) => {
  // start progress bar
  NProgress.start()

  // determine whether the user has logged in
  const hasToken = getToken()

  if (hasToken) {
    if (to.path === '/login') {
      // if is logged in, redirect to the home page
      next({
        path: '/'
      })
      NProgress.done()
    } else {
      // determine whether the user has obtained his permission authRules through getInfo
      // console.log(store.getters.authRules)
      // console.log(store.getters.authRules.length)
      const hasRoles = store.getters.authRules && store.getters.authRules.length > 0
      if (hasRoles) {
        next()
      } else {
        try {
          // get user info
          // note: authRules must be a object array! such as: ['admin'] or ,['developer','editor']
          const {
            resource: {
              authRules
            }
          } = await store.dispatch('GetInfo')

          // generate accessible routes map based on authRules
          const accessRoutes = await store.dispatch('permission/generateRoutes', authRules)

          // dynamically add accessible routes
          router.addRoutes(accessRoutes)

          // hack method to ensure that addRoutes is complete
          // set the replace: true, so the navigation will not leave a history record
          next({ ...to, replace: true })
        } catch (error) {
          // remove token and go to login page to re-login
          await store.dispatch('FedLogOut')
          Message.error(error || 'Verification failed, please login again')
          next({
            path: '/'
          })
        }
      }
    }
  } else {
    /* has no token*/

    if (whiteList.indexOf(to.path) !== -1) {
      // in the free login whitelist, go directly
      next()
    } else {
      // other pages that do not have permission to access are redirected to the login page.
      next(`/login?redirect=${to.path}`)
      NProgress.done()
    }
  }
})

router.afterEach(() => {
  // finish progress bar
  NProgress.done()
})
